From bc4fa6b198557a7f3989eb0865e2c77ac7451d29 Mon Sep 17 00:00:00 2001 From: kibigo! Date: Sun, 3 Dec 2017 23:26:40 -0800 Subject: Rename themes -> flavours ? ? --- app/javascript/flavours/glitch/util/scroll.js | 30 +++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 app/javascript/flavours/glitch/util/scroll.js (limited to 'app/javascript/flavours/glitch/util/scroll.js') diff --git a/app/javascript/flavours/glitch/util/scroll.js b/app/javascript/flavours/glitch/util/scroll.js new file mode 100644 index 000000000..2af07e0fb --- /dev/null +++ b/app/javascript/flavours/glitch/util/scroll.js @@ -0,0 +1,30 @@ +const easingOutQuint = (x, t, b, c, d) => c * ((t = t / d - 1) * t * t * t * t + 1) + b; + +const scroll = (node, key, target) => { + const startTime = Date.now(); + const offset = node[key]; + const gap = target - offset; + const duration = 1000; + let interrupt = false; + + const step = () => { + const elapsed = Date.now() - startTime; + const percentage = elapsed / duration; + + if (percentage > 1 || interrupt) { + return; + } + + node[key] = easingOutQuint(0, elapsed, offset, gap, duration); + requestAnimationFrame(step); + }; + + step(); + + return () => { + interrupt = true; + }; +}; + +export const scrollRight = (node, position) => scroll(node, 'scrollLeft', position); +export const scrollTop = (node) => scroll(node, 'scrollTop', 0); -- cgit